Module Command Error
-1 - System.Exception: You did not send a game or voice server id or the data was not valid. at Web.billingapi.xde97676d01739ced(Object xe0292b9ed559da7d, EventArgs xfbf34718e704c6bc)

Check the log file in Program Files\TCAdmin Control Panel\Logs\billingapi.lastcommand.txt. That has the last values sent to the billing api. Make sure the value of voice_id that the billing api is receiving is TEAMSPEAK3.